HAUNCH BEAMS HAUNCH BEAMS

dearmeltedUrban and Civil

Nov 25, 2013 (3 years and 6 months ago)

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HAUNCH BEAMSHAUNCH BEAMS

A beam designed to lengthen typical span distances by
ilii i d
b
ut
ili
z
i
ng

a

p
i
er

segment

an
d
concrete

pre-stress
b
eams

post

tensioned as a unit.
HAUNCH BEAMSHAUNCH BEAMS

Length = 114’

Weight= 95 tons

Height = 11’
HAUNCH BEAMSHAUNCH BEAMS

Length = 114’

Weight= 95 tons

Height = 11’
HAUNCH BEAMSHAUNCH BEAMS

Length = 114’

Weight= 95 tons

Height = 11’
HAUNCHHAUNCHBEAMS

Very highcenter of gravity and
difficult to stabilize
HAUNCHHAUNCHBEAMS

Very highcenter of gravity and
difficult to stabilize
HAUNCHHAUNCHBEAMS

Temporary
Temporary
braced
haunch beam
HAUNCHHAUNCHBEAMS

Temporary
Temporary
braced
haunch beam
HAUNCHHAUNCHBEAMS

Temporary
Temporary
braced
haunch beam
HAUNCHHAUNCHBEAMS
HAUNCHHAUNCHBEAMS
SHORING SYSTEMSHORING SYSTEM
SHORING SYSTEMSHORING SYSTEM
SHORING SYSTEMSHORING SYSTEM
DROP IN SEGMENTSDROP IN SEGMENTS

Segment ready for
I
-
beam Drop
-
In
I
beam Drop
In
DROP IN SEGMENTSDROP IN SEGMENTS

Drop in Girders
spliced to
Haunch beams
DROP IN SEGMENTSDROP IN SEGMENTS

Drop in Girders
spliced to
Haunch beams
DROP IN SEGMENTSDROP IN SEGMENTS

Drop in Girders
spliced to
Haunch beams
CONNECTIONCONNECTION

Dr
op
-In

B
ea
m

op
ea
with Strongback
CONNECTIONCONNECTION

Dr
op
-In

B
ea
m

op
ea
with Strongback
CONNECTIONCONNECTION

Post Tensioning
Ducts for Strand
Cables
Cables
CONNECTIONCONNECTION

Braced for a Closure
Joint with Concrete
Joint with Concrete
POST TENSIONINGPOST TENSIONING

Post Tensioning

The tensile stren
g
th of concrete is onl
y
about 10% of its com
p
ressive
gyp
strength.

Compressive forces are induce in a concrete structure by tensioning steel
tendons of strands or bars
p
laced in ducts embedded in the concrete.
p
POST TENSIONINGPOST TENSIONING
POST TENSIONINGPOST TENSIONING
POST TENSIONINGPOST TENSIONING
POST TENSIONINGPOST TENSIONING
POST TENSIONINGPOST TENSIONING
POST TENSIONINGPOST TENSIONING
POST TENSIONINGPOST TENSIONING
POST TENSIONING STRAND CABLESPOST TENSIONING STRAND CABLES

4 Tendons Per 11 Beams = 44 Tendons Total

Tendon Lengths (each)= 917 ft

Total Tendon Length = 40,348 ft = 7.65 miles

Tendon Weight (each) = 8,136 lbs

呯瑡氠呥湤潮T坥楧桴W
=
″㔷9㠴8汢猠
=
‱㜹⁴潮

呯瑡氠呥湤潮T坥楧桴W ㌵3
,
㤸㐠汢猠‱㜹⁴潮

Single Tendon Tension Force = 550 Kips = 550,000 lbs

Tendon strain (elongation) = 73 in = 6 ft
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